Plunger-wiping device



Aug. 20, 1929. H. G. MOBLEY 1,725,593 v PLUNGER WIPING DEVICE Filed Jan.25, 1926- '2 Sheets-Sheet 1 Aug. 20, 1929. MQBLEY 1,725,593

PLUNGER WIPING DEVICE Filed Jan. 25, 1926 2 Sheets-Sheet 2 Patented Aug.20, 1929.

UNITED STATES HENRY GRADY MORLEY, OF LEAGUE CITY, TEXAS.

PLUNGER-VTIPING DEVICE.

Application filed January 25, 1926.

This invention relates to a device for wiping the reciprocating plungerof a pump or like mechanism to maintain the plunger clean and preventcontamination. of the fluid handled by the pump and of the lubricantwith respect to each other.

One of the objects of this invention is to provide a structure which maybe readily attached to the packing gland of a pump or engine and readilyseparated therefrom.

Another object is to provide a device of this type in which the wipingelement is held in resilient contact with the plunger to be wiped at allpoints of its periphery.

A further object is to provide a device of this type in which the devicereadily and automatically adjusts itself to variations in the positionof the plunger rod with respect to the frame.

Another object is to provide such an apparatus which may be easily andreadily in spected and dismounted, and quickly and accuratelyreassembled.

With these and other objects in view as will appear in the course of thefollowing specification and claims, one form of we cution of theinvention has been illustrated on the accompanying drawings, in which:

Figure 1 is an elevation of the device mounted about a plunger which isshown in section.

Fig. 2 is a side elevation of the same device, with parts of the pump orengine cylinder shown in section.

Fig. 3 is an end elevation with partial sections, showing the assemblageof the several parts.

Fig. 4 is a section on line 4 of Fig. 3.

This device is intended to wipe the plunger or piston rod 10 during itsreciprocation to and fro in the cylinder 11. Since the invention relatesto the wiper and not to any particular cylinder or plunger construction,the latter elements have been only 4.5 fragmentarily shown. The plunger10 is packed by a clamping bushing 12 for the packing material, which isdrawn tight by means of the cap screws 13 which pass through the flange14 of the bushing 12.

The wiping device according to the presend invention has two half-ringsor ring sections 15, 16. The half-ring 15 has a pair of pins 17 whichextend across the bracket between the half-rings into the sleeves 18 ofthe half-ring 16. These hold the two half-rings in position in plane.The lower Serial No. 83,619.

half-ring 16 has a pair of projecting lugs 19 at its upper edge, whichare received between the flange 14 of the packing bushing and the outerend 20 of guide members 21, which are clamped rigidly to the flange 14by means of certatin of the cap screws 13, as shown in Fig. 1. By virtueof this arrangement, the half-rings 15 and 16 are held against planarhorizontal movements, but are permitted to move vertically as a whole bythe engagement of the lugs 19 with the guides 20 and the flange 14. Inorder to force the half-rings resiliently toward each other, a yoke 22is pivoted at 23 to the lower half-ring 16, and a yoke 24 is looselymounted over the edge of the upper half-ring 15; these yokes also serveas guides for the halfrings 16, 16. The brackets 25 are rigidly securedto the flange 14 at the upper and lower portions of the same and carrythe aligning bushings 26 integral therewith. The bushings 26 receive thepins 27 and are pressed resiliently in contact with the yokes 22 and 24by means of the coil springs 28. The compression of these coil springsmay be adjusted by means of the cap screws 29 which are threaded intothe outer ends of the bushings 26, and which may be locked in ad justedposition by means of the lock nuts 30.

The half-rings 15 and- 16 are formed of U-shaped cross section as shownin Fig. 4, and carry at the bottom of the concavity a plurality ofindividual leaf springs 31, which are perforated near their middles andare held in permanent relation to the half-rings 15 and 16 by means ofthe rivets 32. It will be understood that the normal tendency of thefree ends of these springs 31 is to move inward toward the plunger rod.

A packing ring 33 of leather, felt,.or' similar material is placedwithin the concavity of the half-rings 15 and 16 and is guided andsupported thereby, with its inner periphery projecting slightly beyondthe inner periphery of the half rings and into contact with the plungerrod 10. It is preferable to lap the ends of the ring 33 as shown at 34;it likewise will be understood that this ring may be made of one or moreparts without departing from the spirit of the invention.

In operation, when the device is assembled upon the plunger rod, thescrews 29 are turned until a substantially uniform tension is exertedupon the upper and lower halves, and with respect to the plunger rod 10itself. In this condition, the packing 33 is forced uniformly againstthe plunger rod by the action of the individual springs 31, so that theentire periphery of the plunger rod is wiped at each reciprocation, andwhen the plunger rod is employed as an element of a pump for feedingcrude oil, for example. It is apparent that no mingling of the crude oilfrom the pump and of the lubricating oil from the engine or pumpcross-head can occur, since the latter may be stripped off by thiswiping device, and returned for reuse.

It is apparent that the form and arrangements of the s veral parts maybe modified without departing from the scope of the appended claims.

I claim:

1. In a Wiping device for a rod, a member located about said rod andhaving movement axially relative thereto, a plurality of ring sections,interengaging means mounted on said ring sections to hold said ringsections together in a plane, brackets on said member, means to holdsaid ring sections in position about said rod including resilientdevices carried by the brackets to force the ring sections against therod, and a wiper material carried by said ring sections.

2. In a wiping device for a rod, a member located about said rod andhaving movement axially relative thereto, a plurality of ring sections,interengaging means mounted on said ring sections to hold them togetherin a plane and permitting movement toward and from each other, fixedguides mounted on said member and cooperating with said sections torestrict the movements of said sections axially with respectto said rod,guide supports mounted on said member,

sliding guides in said guide supports engaging said ring sections,springs acting upon said sliding guides to force the ring sectionstoward each other and upon the rod While permitting movements of saidring sections so that they may accommodate themselves to the position ofthe rod with respect to said guides and guide supports, and a wipermaterial carried by said ring sections,

3. In a wiping device for a rod, a split ring of lJ-shaped section,interengaging means on said ring sections tohold the sections of saidring in plane and to prevent movements of said ring out of said plane,means to force the sections of said ring toward each other to surroundsaid rod, a wiper material carried in said rings, and a plurality ofleaf springs carried in the corn cavity of said ring to hold saidmaterial against said rod.

4. In a Wiping device adapted to be mounted on the end of a cylinder towipe the reciprocating rod thereof, a pair of brackets carried by saidcylinder, a split ring, pin and socket members on the sections of saidring to hold the same in plane, guides to prevent movement of said ringout of such plane and to permit movement of its sections toward saidrod, said guides including yokes carried by said brackets andresiliently forcing said sections toward each other, and a wipingmaterial carried by said ring and resiliently forced into contact withsaid rod.

In testimony whereof, I affix my signature.

HENRY GRADY MOBLEY.

